Tool grinder



Maj 24, 1932. l W Fb STlMPSON 1,860,211

TOOL @BINDER v Filed OCT.. l5, 1928 2 Sheets-Sheet l May 24, 1932. w. F.sTlMPsoN TOOL GRINDER 2 Sheets-Sheet 2 Filed OCT.. l5. 1928 Patented May24, 1932 j. if

y WALTERF. sriivrrsoiv, or `riotiisvinLE, iin-ii'ifricinrY i TooLeRiNDERl Application iled October 15, 192.8.v Serial Nog-312,632. V f

This invention relates to grinders and more particularly to aVconst-ruction of attachment for a meat grinder through which thismachine may be used for the sharpening of knives and other tools. Tothis end the invention consists inthe construction as hereinafter setforth. l Y

In the drawings: i

Figure l is a vertical longitudinal section 10 through a motor drivenmeat grinder to which my improvement is applied.

I Figure 2 is a similar view of the meat grinder without the attachment.

Figure 3 is a perspective view of the grinder attachment. i

Figure 4 is a cross section through Vthe at- Y tachment showing thegrinder in elevation.

The power driven meat grinder to which my attachment is appliedcomprises essen-` tially a housing A enclosing an electric motor B whichtransmits its power through a pinion C and large gear wheel D to a shaft'E above the motor. This shaft E is aligned with a socket F in thehousing A, which socket receives the shank Gr of the meat grinder casingH. The shaft E is also adapted'for coupling engagement with the shaft Iof the screwV or worm J which feeds themeat from the hopper K to thecutters at lthe outer end of. the 3o casing H, Said shaft I beingjournaled in a `bearing I in the inner end of the casing H which holdsit in substantial alignment with the shaft E. 4The parts thus fardescribed form no part of the present invention but only the machinel'towhich my improved grinding attachment may lbe applied, and whichlatter is of the following construction: L is a shaft which is adaptedfor insertion through the meat grinder housing IIwhen 1.0 the feed worinJ is removed, and having at its inner end a coupling tongue or spline Mfor engagement with akeyway in the end of theA shaft E. The shaft Lforms an arbor on which is mounted the grinder wheel NV lthrough themedium of clamping collars() and O. P is a cap member which forms areplacement for the cap vmember Q of the 1 engages' the externallythreaded vportion i o f the 4'meat grinder casing. (Itfis' alsoprofi 'i'vided withv anj'loutwardly extending portionf i" P?:v'vhich-.rfori'nsfa4 journal.v bearing forf the shaft L andthe`outerfend l of which abuts j against the collar O. Sis a collar uponthe 4slia'ftL'iighcl'ir.forms an'abutinent for a coil` i springT'sleeved on'theshaft L and bearingff `With its opposite end againsttheinner face ofthe 4cap I3!" This servfes .to yieldably .hold f the:shaft zw'itli the collar C) bearing against thecouterlend of thevjournal bearing P2 but permits Jof; an 'outwardV movement of said '1shaft against theutension ofthe spring: UV

`is a guard orhousing for the grinder wheel N which is provided witha`sleeve'VA portion IU` engagingthe bearingvP?. Y isa thumb screwfA forclamping the sleevefUV uponthe bearing.,

P2. '.Wzis a` rod or-postzrisingfrom a socket W .in the sleeve U and X1is a receptacleffor v waterinounted on-theliipper end of the-post W.Xisa cock forfdis'chargingwater'fromf4 the receptacle X on to thegrinder wheel `or the work .whichis,beinglground fi V i lWiththeconstruction as described, wheneverlit Iisdesired tol use the toolgrinder-the cap Q of the'meat grinderis removed, perinitting lofremovalof the cutter R and'feedV l screw J. The shaft -L fis then.inserted through the casingH withjits inner end engaging the bearing I"holding it in alignment with the fshaftE, andthe lcap `l? is thenscrewed upon theouter endV of the casing H until. tight. c If the splineorkeyend in the shaft L does not register with the keyway'r-Mfoftlieishaft E, the shaftIJwill beforcedout` ward' in its bearingiPz,"thisbeingipermitted e by the yielding of the spring T. .Aslsoongrhowever, asfrotary movement is imparted to` the shaftE theVvsplineaiidgkeyway will come into registration and the spring T willforce l! them into engagement. When the capfi's screwed on tothecasingvit may happen thatv the housing U will not be properlypositioned or thepost W arranged invertical position.

screw V and turning these parts tothe proper position.

VThis may be correctedby loosening the set` When the motor is setti-noperatio'nfthef grinder 'wheel' will be driven and may .beA

Y use d for sharpening knives or otherrpworki ,i whilel lthe/water inthe receptacle vX ispdisf charged through a cock X on-.to the work.y

TheY attachment ma be removed by simply unscrewing'the capV andwithdrawing'the' `shaftfL, after which the meat grinder ,parts maybereplaced and themachine usedgiior` its f normalff'unction.

" What I claimv as my invention is:

, -l. The combination with the housing and 'y power devices offa meatgrinder comprising a hollow casing and a shaft at the inner end of saidcasingin axial alignment therewithv Y n and having a steppedfeundVportionrfor engagement with the grinder feed screw-,of a

tool grinder attachment Aconfiprisingfa `cap jhavingjailetaohable,-engagementy withi the Y Outer end of said hollow casingashaftjour- 'nal bearing integrali` with said cap, a .shaft `engagingSaidbearing .and extending inward. throughsaid hollow casing having astepped inward endfor engaging thev steppedl rportion of said 'firstmentionedfshaft, a

grinder'wheel mounted on the'outer endof said` last mentioned shaftrlfand means for fyieldabl'y; pressing said lastnoentioned'shaft` inwardwhereby it isipermitted to'automatiy 'cally engage. thesteppeclV portion'with the c having: a detachable engagement with the l outer end of saidhollow casingya shaft jour corresponding stepped portion Vof therpfirstVmentioned :shalt Y Y n 2. :The combination'jwith the'ihousing and Y.-*power devices of'a meatgrinderscomprising l a hollow casing andashaft at the innerend Vof said vcasingfin axial'alignmenttherewith` Y YprovidedwithV astepp'ed. end portion'for engagement with. thegrinder-feed screwfo` ,a

tool grinder*attachmentcomprising a cap nal bearing integral with saidcap, a shaft engaging said bearing and 'extending'inward through saidhollow easing being provided v at its' Vinner end with a stepped portionfor engaging the stepped portion of the rst mentioned shaft',l agrinderwheel mounted on thelastmentioned shaft adj acent'rto the outer end ofsaid journal,bearing`,a spring sleeved `on said shaft on thelinner endof said journal bearing and an abutment for saidspring on said shaftwhereby Vit is yieldably pressedv Yinward to rautomatically engageitsstepped portionwith"y the corresponding portionv of the firstmentioned shaft. f' I v, y i 'l tIn testimony whereofl alix my signaturef Y Y 55, Y c

